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Greenhouse necessary equipment - hand-held,[link widoczny dla zalogowanych], portable devices has become an important greenhouse products

Generally between 0 to 5.0. EC is the smallest unit uS / cm,[link widoczny dla zalogowanych], the unit will be expanded to 1,000 times ms / cm units. ~ Generally speaking, EC values remained at 0 to 3.0. Greater than 3.0, burning and root increases. When the salt solution increases, the electrolyte solution will also increase. EC meter has two probes, two probes into the solution, you can easily measure the amount of salt solution. The higher salt content in solution, the stronger conductivity; lower salinity, conductivity worse. Therefore, the conductivity of distilled water, the worst, usually 0; which contain 600mg/kg of nitrogen fertilizer, are highly conductive. EC meter cheap, and reliable. EC meter has three different types of us ranges: low range (0 ~ 199uS), in the range (1N1999uS) and high range (0 ~ 5.0mS or 1-19.99mS). In general, most companies will buy high greenhouse range (0 ~ 5.0mS or 1 ~ 19.99mS) the type and accuracy of +0.02 should purchase a resolution of 0.0] of the instrument. EC meter scale application of a single standard meter solvent, can purchase or use of special solvents distilled water, mixed groups can also be used. However, to choose ~ a close 1.41mS the standard value, as this and the value of the greenhouse is similar matrix. Infrared thermometer temperature and you think there are very different. Especially the plant surface temperature and the temperature of the matrix. Growers often taken for granted that their plug seedlings or roots clearly temperature of the substrate, but in fact, the ambient temperature and they think there are very different. For example: in the greenhouse, plug seedling substrate temperature is 95. F (35cc), and the growers that the temperature is 72. F (22.2cco Another example: the temperature is actually root 60 - 63. F (15.5 ~ 17.2cc), while the growers think it is 72 - 74. F (22.2 - 23 .3 uco In these cases, either germination or root, will be affected. These problems will, such as servers to avoid it? application of infrared thermometer can solve these problems. as long as you, ~ ltF line thermometer aimed at an object, it will measure the surface temperature. The instrument responsive to temperature, and can help growers solve the surface temperature of plants caused by higher than expected losses,[link widoczny dla zalogowanych], and the provision of choice of temperature, improve the germination and rooting conditions. all greenhouse The temperature should be as the base of plants and substrate, rather than air temperature, infrared thermometer just to help growers solve this problem. infrared thermometer is based on the infrared emitted by objects to measure the temperature. Usually, infrared laser thermometer to by issuing accurate measurements. When aligned objects measured temperature, the surface will appear in a small red spot. This is very important, because different regions,[link widoczny dla zalogowanych], the temperature will be different, especially in the accurate measurement of the time so we know the exact location of the measurement is very important. In general, when measured 2 feet away from the object, so the data will be accurately measured. measuring instruments, while also maintaining the stability, because if the fast-moving equipment, then Its measurement accuracy will decline, because at this time it is a broader measure of the area. In addition, the sensitivity of different infrared thermometers are not the same. Some difference of �� 1. F, some difference of �� 3. F. Thermometer The higher the sensitivity, the price more expensive. In general, the price of an infrared thermometer from 50 to 300 dollars. the most expensive thermometer highest sensitivity (+1. F), the sensitivity of the cheapest minimum thermometer (> +2. Fo temperature of the solution is very important, unless you have a temperature compensation device (ATCo If not, then the ideal solution temperature value is 77. F (22. copH general application of the two instrument calibration scale 4.0 and 7 .0. In all the instruments, pH meter accuracy and calibration of high demand, and the screen is easy to damage the sensor. Now, the best equipment is still on the table, used in the laboratory. of Introduction: JohnErwin is the University of Minnesota Horticulture Science Professor, is mainly engaged in agricultural experiments, gardening research. Source: GreenhouseGrower (please pay attention to the next issue of greenhouse facilities, Use and Maintenance of the interested readers to discuss the letter calls; please pay attention to China's greenhouse forum. E-mail: [link widoczny dla zalogowanych]
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